iPhone Programming - UIImageViews:Dragging multiple Images

A Quick tutorial requested by LockerzSwagbucks(Channel Link Below).

In this tutorial I teach you how to enable multi-touch to drag 2 images around the screen at once.

Main Code:
-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
UITouch *touch = [[event allTouches] anyObject];
CGPoint location = [touch locationInView:self.view];

if ([touch view] == image) {
image.center = location;
} else if ([touch view] == image2) {
image2.center = location;
}
[self ifCollided];
}

if (CGRectIntersectsRect(image.frame, collisionImage.frame) || CGRectIntersectsRect(image2.frame, collisionImage.frame))

LockerzSwagBucks: http://www.youtube.com/lockerzswagbucks

First Video: http://www.youtube.com/watch?v=H1wOlmwN94o

Link: http://developer.apple.com/devcenter/ios/index.action
Website: http://failcake.webs.com/
Twitter: http://twitter.com/failcakeapps
Channel: http://youtube.com/milmersxcode

Category:

Howto & Style

Tags:

• iPhone
• Programming
• Apple
• Apps
• Xcode
• Image
• Drag
• Drag-able
• Dragging
• UIImageView

[inigo333]

Doesn't work :(

anybody's succeeded? help please...

[MilmersXcode]

@inigo333 What are the problems you are encountering? I can help.

Milmer.

[chasethemooseinc]

Ya I did that but I have a different colide statement that I put in erry thong works drag and such but not multituch

[MilmersXcode]

@chasethemooseinc I don't know then mate. I am sorry. I have absolutely no idea how to do it. Multitouch is a tricky thing in my opinion. You could try adding [self setMultipleTouchEnabled:YES]; into the viewDidLoad method but I don't think that would work.

If you do find out how to do it give me a ping. Other than that I am extremely sorry I can't help you :(

[vincentyaow]

Thank you very much, great tutorial!

[3zOoOz777]

thanx a lot !!!

[MilmersXcode]

@chasethemooseinc Yes it does matter. For 1 make sure you have another IF Statement for your 3rd image.

2nd, Make sure you have the .centers named correctly for each if statement otherwise, the center of the same image will only be draggable. Below is some code to help you with 3 images.

if ([touch view] == image) { image.center = location; } else if ([touch view] == image2) { image2.center = location; } else if ([touch view] == image3) { image3.center = location; }

[chasethemooseinc]

@MilmersXcode Yes i have and i copied the code from you and i am using 3 images does tht mater

[MilmersXcode]

@chasethemooseinc Make sure you have checked the boxes in interface builder, Make sure you have got the if statements correct